当货物到达某一目的地的时候，某些人会打开包装材料，并将它放到一个琼脂板上，然后让细菌在一个提前安排好的环境中生长。

When the product arrives at its destination, someone would take the packaging material, print it on an agar plate [a petri dish] and then grow the bacteria under a pre-arranged growth condition.

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单个细菌生长繁殖会在琼脂上产生斑点。

Spots showed up on the AGAR as individual bacteria grew and multiplied.

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结论，该植物复方精油熏蒸法，对营养琼脂平板表面上细菌具有一定杀灭作用。

Conclusion: the plant compound essential oil fumigation has certain killing effect on the bacteria on nutrient AGAR plate.

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You've probably seen agar plates, if you smear a solution that's contaminated with bacteria on it, then that bacteria will grow on this agar rich medium and you'll get many, many copies of the bacteria that you've smeared at low density onto the plate.

你们大概见过琼脂培养基,如果将有细菌的溶液涂抹在培养基上,细菌就会在富含琼脂的培养基上生长,你会得到许多许多细菌,即使你只涂抹了低浓度溶液

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